CVE-2004-1464: Cisco IOS Denial-of-Service Vulnerability

CVE-2004-1464 · Severity: critical · CVSS 5.9 · Exploited in the wild · Published 2023-05-19

Cisco IOS contains a denial-of-service vulnerability where a crafted TCP connection to the Telnet or reverse Telnet port can exhaust virtual terminal (VTY) connections. This can block legitimate administrative access via Telnet, RSH, SSH, and HTTP.

Technologies: Cisco IOS, Cisco IOS XE, Cisco IOS XR. Vendors: Cisco.

Quick answers

Is CVE-2004-1464 exploited in the wild?
Yes. CVE-2004-1464 is known to be exploited in the wild, first recorded on 19 May 2023. Treat it as urgent.
How severe is CVE-2004-1464?
Critical severity, with a CVSS score of 5.9, published 19 May 2023.
Which products and versions are affected?
Cisco IOS 12.2(15) and earlier.
Is there a fix for CVE-2004-1464?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2004-1464 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2004-1464?
Check whether you run Cisco IOS, Cisco IOS XE or Cisco IOS XR. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco IOS 12.2(15) and earlier

Timeline

  • 2004-08-27: disclosed: Initial vendor advisory date based on reference URL
  • 2023-05-19: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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